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2021

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cc-by (c) LHCb collaboration et al., 2021
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/185476

Search for the doubly charmed baryon Ξ+cc in the Ξ+cπ−π+ final state

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Recurs relacionat

https://doi.org/10.1007/JHEP12(2021)107

Resum

A search for the doubly charmed baryon Ξ+ cc is performed in the Ξ+ c π −π + invariant-mass spectrum, where the Ξ+ c baryon is reconstructed in the pK−π + final state. The study uses proton-proton collision data collected with the LHCb detector at a centreof-mass energy of 13 TeV, corresponding to a total integrated luminosity of 5.4 fb−1 . No significant signal is observed in the invariant-mass range of 3.4-3.8 GeV/c 2 . Upper limits are set on the ratio of branching fractions multiplied by the production cross-section with respect to the Ξ++ cc → (Ξ+ c → pK−π +)π + decay for different Ξ+ cc mass and lifetime hypotheses in the rapidity range from 2.0 to 4.5 and the transverse momentum range from 2.5 to 25 GeV/c. The results from this search are combined with a previously published search for the Ξ+ cc → Λ + c K−π + decay mode, yielding a maximum local significance of 4.0 standard deviations around the mass of 3620 MeV/c 2 , including systematic uncertainties. Taking into account the look-elsewhere effect in the 3.5-3.7 GeV/c 2 mass window, the combined global significance is 2.9 standard deviations including systematic uncertainties.

Matèries

Hadrons, Gran Col·lisionador d'Hadrons, Física de partícules, Experiments

Matèries (anglès)

Hadrons, Large Hadron Collider (France and Switzerland), Particle physics, Experiments

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Articles publicats en revistes (Física Quàntica i Astrofísica)

Citació

LHCb collaboration, ALFONSO ALBERO, Alejandro, GARCÍA MORENO, Paula, GARRIDO BELTRÁN, Lluís, GIRONELLA GIRONELL, P., GOMEZ FERNANDEZ, S., GRAUGÉS POUS, Eugeni, LOBO SALVIA, A., MARIN BENITO, Carla, MAURICIO, J., VAZQUEZ GOMEZ, R.. Search for the doubly charmed baryon Ξ+cc in the Ξ+cπ−π+ final state. _Journal of High Energy Physics_. 2021. Vol. 16, núm. 2021, pàgs. 1-27. [consulta: 20 de gener de 2026]. ISSN: 1126-6708. [Disponible a: https://hdl.handle.net/2445/185476]

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